Based on Dirac-Fock, Dirac-Slater, Hartree-Fock and Hartree-Slater self-consistent-field methods, we have conducted calculations of reduced normalization factors of occupied shell wavefunctions of nitrogon, iron, and uranium atoms as well as nitrogon-like inon and uranium ions. Their dependence on various coupling terms as well as relativistic effects and effects of the Slater local electron density approximation are discussed.